Note:1. Hydrogen content 1.6 ppm Max & Aluminium – .015 max.2. Bhilai Steel Plant has taken up project to produce rail sections 68 KG & ZU1-60 (Asymmetric RAIL).3. BSP is also developing 110 UTS quality rails.4. Bhilai Steel Plant can also produce rails as per specifications of the union of international railways and other foreign specifications, like British standard or Japanese industrial standards if sufficient orders are available.

Chemical Composition Percentage

Grade

C

Mn

Si

S(max)

P(max)

Al(max)

Mo(max)

Cr

V (max)

Nb(max)

10-4%(ppm) max by mass O

Hydrogen content in liquid steel(max)

880

0.60-0.80

0.80-1.30

0.10-0.50

0.030*

0.030*

0.015

-

-

-

-

-

1.6 ppm

1080 Cr

0.60-0.80

0.80-1.20

0.50-1.10

0.025

0.025

0.004

0.20

0.80-1.20

0.20

20

1.6 ppm

1080 HH

0.60-0.80

0.80-1.30

0.10-0.50

0.030*

0.030*

0.015

-

-

-

-

-

1.6 ppm

Special Rail Stee

NIOBIUM (NB)

0.60-0.80

0.80-1.30

0.10-0.50

0.030*

0.030*

0.015

-

-

-

0.04

-

1.6 ppm

VANADIUM (VN)

0.60-0.80

0.80-1.30

0.10-0.50

0.025*

0.030*

0.015

-

-

0.20

-

20

1.6 ppm

Corrosion Resistant Rail Steel

Copper-Molybdenum (CM) 0.35

0.60-0.80

0.80-1.30

0.10-0.50

0.030*

0.030*

0.015

0.2-0.3

-

0.25-

-

-

1.6 ppm

Nickel Chromium Copper(NC)

0.60-0.80

0.80-1.30

0.10-0.50

0.030*

0.030*

0.015

0.25

0.50-0.65

0.3-0.4

0.25-

-

1.6 ppm

Mechanical Properties

UTS(MPa)(min)

Yield Strength***(MPa)(min)

Elongation% om Gauge Length-5.65 So(min)

Running Surface Hardness (BHN)

880

460

10.0

Min 260**

1080

560

9.0

320-360

1080

460

10.0

340-390

880

540

10.0

Min 260**

880

630

9.0

Min 260

880

460

10.0

260

880

520

10.0

260

So=Cross sectional area of tensile test piece in mm2* 0.035 maximum for finished railThe chemical compositions specified as above are applicable to Ladle analysis and Product Analysis. Manufacture shall ensure that chemcial composition at ladle analysis should be suchthat product analysis also satisfies the requirement of chemical composition as above.** Desirable Value.